package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file)
    {
        String originalFilename = file.getOriginalFilename();

        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        String fileName = UUID.randomUUID().toString()+suffix;

        File Dir=new File(basePath);
        if(!Dir.exists())
        {
            Dir.mkdirs();
        }


        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }


        return R.success(fileName);

    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response)
    {
        try {
            FileInputStream fileInputStream=new FileInputStream(new File(basePath+name));

            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            int len=0;
            byte[] bytes=new byte[1024];
            while ((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();

            }

           fileInputStream.close();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
